Food or edible material: processes – compositions – and products – Measuring – testing – or controlling by inanimate means
Patent
1980-03-07
1981-08-04
Corbin, Arthur L.
Food or edible material: processes, compositions, and products
Measuring, testing, or controlling by inanimate means
62513, 99278, 159 24A, 159DIG32, 203 26, 426424, 426425, 426489, 426520, 426524, 426600, 426655, A23L 120, A23L 128
Patent
active
042822599
ABSTRACT:
A method of preparing an extract from hops comprises contacting the hops to be extracted with carbon dioxide in the liquid state to dissolve the matter to be extracted in the liquid carbon dioxide, heating the solution of extract to evaporate carbon dioxide from the solution of extract, compressing and condensing the evaporated carbon dioxide vapor to re-form liquid carbon dioxide, and re-cycling the liquid carbon dioxide to contact the material to be extracted. At least part of the heat evolved from the carbon dioxide vapor after its compression and during its change of state from vapor to liquid carbon dioxide is used to cause the change of state of the liquid carbon dioxide in the solution of the extract to evaporate the carbon dioxide from the solution of the extract.
A plant for the preparation of an extract of hops by extraction with liquid carbon dioxide is also disclosed together with modifications of the plant to enhance the recovery of hop oils or to obtain a separate extraction of the hop oils.
REFERENCES:
patent: 1969187 (1934-08-01), Schutt
patent: 2895546 (1959-07-01), Sadtler
patent: 3477856 (1969-11-01), Schultz
patent: 4104409 (1978-08-01), Vitzthum et al.
McCabe et al., Unit Operations of Chemical Engineering, 1956, pp. 570-571.
Cockerill Peter E.
Wheldon Alfred G.
Corbin Arthur L.
The Distillers Company (Carbon Dioxide) Limited
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